Perpetual calendar



Jan. 8, 1935. o. A. CHIDES TER PERPETUAL CALENDAR Filed May 6, 1955 INVENTOR 08/974 ,4 C'H/DA'STf'E' u 4; @W

ATTORNEY Patented Jan. 8, 1935 UNITED STATES" 8 Claims. v[(oi 40-5115) 4 My invention relates to perpetual Calendars, and the objects of my. invention are} k v First, to provide "a perpet al. calendar wherein the arrangement of -day's inany givenmonth of any given yearmay'be readily'aiid quickly se lectedj 1 1.

Second, to providea perpetual'calendar wherein the year date is divided so thatfthe calendar may be suitable for dates ranging through several centuries while reducing to. a, minimum the number of charactersneeded; Z

Third, to provide a perpetual calendar in which the entiremonthly calendar-is exposed to view automatically whenjthe desired'year and' month are locatedj-l;

, Fourth t jprovidealperpetual ealendarvvhi ch requiresonly awsmall amount of manipulation in order to be setfor use; 'andf r l a Fifth, to provide on the whdlefanbvelly con structed-perpetual calendanwhicfi is" simple of construction, durable, efficient."inlitsaetion, land which will not readily deteriorate or .getoutpi order.

' With. these appear hereinafter, my'invention consistsfofcer+ novel features of .eonstruetion, combination and arrangement of parts and portions asyvill'be hereinafterv described in detail and particularly set forth in the appended clanns', reference being had to the accompanying drawing and to. the characters of reference thereon which form a part of this applicatiominwhichz' Figure 1 is a-frontyiew ofmyperpetual calendar; Fig. 2 isatransverse sectional'vi'ew thereof through2''2of Fig. 1 Fig. 3,is ,an enlarged sectional view through 3--3V of; .Fig. 2 showing the front sides ofjthe indicia bearing memberslfjfj Similar characters of. reference reiertd similar parts and portions throughout the'several, views of the drawing. 7 v

Bear indiciamember 1, forward indicia" mem ber 2, inner mask 3, outer mask journal'member 5, and tensionwashers 6 constitute the prineipal partsand portions of my novel perpetual calendar. The perpetual calendar. comprises a plurality of disk members mounted in superposed relation. The bottom orrear disk-forms a rear indici'a'mem her 1. "I'his memberfincludes an'arcuate'porti'on andgother objects}: in vievv as trill twice, one represen V to designate their usef for leapi, 'yearonly; j" n 1 The above meiitioned areuate portion; 1a. nor.. m'allyoecupies the upper side of ..,the in'er'nber "1; ondar ua p rt pn 1.0 s eda h lower" po i of he'j b' i' ha d ialikawfi v d d with a plurality radiating lir'iesldi; The radi atinglinesld" colunm"wh1gh 'are intersected b fa ate r e ne 1Qiorm i y i on being in meteor; r'ed' rows; Printedjin k theseveraI squares "formed "by l0 l fll n T6313 l a it o nu a s desige nating the y s inaeentury, the "numerals rep? resenting th last two 'figures'in the year dates. fl fhe numerals indicatingileap; year are preferably c'oloredred or t aek-g'reund'is' so colored;

' "ate-portionilethe mem;

I short extendiii'g portion h hifl i a na e: Y

ohcentfidre atiorifuponrtherear indie; is a forward 'indicia memb r; 29

which isgenerauy circular ihl fo and is marked with "a plurality.*offl fradiating lines continuing through an art; semevvhat greater than a'half cirhe rad'eitin lines are intersected a m.-

arraf i e i ajn wv f ws b i n with every seventh radiating; column. j [Printed or otherwise'forrnedin 'theseveral/rows are nuimerals designating; f the T number fof i days' in a ally positioned lines 2b, "The helie- 'num f "l r neefi" i1 1 bn c five; 0 i t a r n n the IW i l 9f y columnifbriugs' to "view ac'omplete possible calen idar month' having thirty-(me(31);Fdays, ,j

j Also. rinted on the forvvai' jfindiciahmember 35 are several numerals designating the first-two numbers of the year dates of several centuries.

Opp site th ea da e nume al jind ia member extendedforming a handle portion 2 ,A inne mas s i o e e b ward iiidi i me er, 2;- .f fh m k 3 comp ises a The major' diametered. portion 3a is. adapted to ber' 1 while'both portions of the disk cov er the day indicating numerals on the diskf2. .'[I The ma- Jordiameter ed portion 3av is provided withaslot 36 therein adapted to expose one month'character 0 as shown in Fig. 1. Below the slot .30 there isprdvidedi a second: slotjBd adapted to. expose seven eeluni'ns'of I the day indiciav of the disk 2; Above each of the columns thevdi skiaf is provided vvith "i nr nfiw e sriav d t n ar i- 'e'over 'thernonth' characters on the indic'ia'm'emwhich is adapted to expose a column formed by adjacent pairs of lines 1d. ,The'jmask 4 is also 4 which comprises a minor diametered portion 4a of slightly less than a half circle in extent, and a minor diametered portion 41) extending the re,- mainder of the circle. The minor diametered portion 4b is of sumciently small radius to completely uncover the slot in the mask 3. The major diametered portion 4a is provided,,with'a ra= dially extending slot 4c intersecting, its periphery provided with a small slot 4d in its periphery adapted .to expose any one of the century numerals providedon the indicia disk 2.

' The several .disks are apertured at the center and receive a journal rivet -over theextremi ties of which are fitted tension washers 6, shown inFigs.'1and2. Operation ofmy perpetual calendar is as follows: The outermask 4 is shifted'relative to the forward indicia member 2' until the desired century indicating numerals are exposed, then the mentwill be exposed in the slot 3d; I

As for example, if it is desired tozexposethe calendar month of April 1933, the slot 441 isposi- .tioned so as to' expose the numeral 19 on thelindicia'member 2, the slot 40 is positioneds'ofas to expose the numerals 33 on the indicia member "1,

and the slot 30 is shifted until the,word Aprilv is exposed therein. By changing-thenumber of the centuryv date exposed, the calendar maybe used to determine any date in the future or in the past since September 14, 1752, when the. first Gregorian calendar was adopted.

. It should be here-noted that each column of year dates on the member 1 indicate normal years wherein the twelve months thereof beginonidentical days; thus the two members 1 and-2 are set in the same relation to be operable for the years 1911, 1922, and 1933,. etc. Also for any adjusted relation of the members 1 and 2 wherein the year dates register with the notches 4c and 4d, a complete composite year calendar is formed by the month characters and their respective groups of numerals.

Though I have shown and described a particular construction, combination, and arrangement of parts and portions, I do not wish to be limited to this particular construction, combination, and arrangement, but desire to include in the scope of my invention the construction, combination, and arrangement substantially as set forth in the appended claims.

Having thus described my invention, what I [claim as new and desire to secure by Letters Pat- 'one disk, numerals on another disk representing the different years of a century, and means on a third disk for designating particular century representing characters and year representing numerals to mark a completed year date.

2. A perpetual calendar comprising, a plurality of disks arranged in superposed relation adapted to be shifted about a common axis, century rep-1 resenting characters on one disk, numerals on another disk representing the difierentyears of a century, means on a third disk for designating particular century representing characters and ,year representing numerals to mark a completed year date, a plurality of numerals representing the several possible month calendars, a plurality of characters representing the possible months in a year, said numerals and characters arranged on the-two first mentioned disksin coactive relation, and means for designating a particular month and a corresponding month calendar.

. 3. A perpetual calendar comprising, a pair of relatively shiftable members the one bearing century dates, theother bearing theyearly divisions of a century,means fordesi'gnating a century date and ayearly division thereof'to indicate a complete year date, one of said shiftable members bearing characters representing the several months of; a year, the other: bearing-indicia representing the several possible monthly calendars, said indicia and characters adapted to bedisposed in corresponding relationupon adjustment of said shiftable members'to indicate a given year date, and an instrumentality for.

designating a particular month character and its corresponding "month calendar indicia.

4. A perpetual calendarcomprising, ',a first member, characters thereon j representing the several months of a year, a second member, a

series of overlappinggroups of indicia thereon, each'group representing a possible month calendar, one. of said members bearing aplurality of year dates arranged in groups, the normal years represented in each group having identical ar- I rangements of .month calendars for correspond ing months thereofyslotted, mask means associatedwith the other member for designating any one of the severalgroups ofyear dates whereby the month characters and month calendar groups are in predetermined corresponding relation, and an instrumentality for designating a particular month character and its corresponding month calendar group. v

5. A perpetual calendar :comprising, a first indicia bearing member, having helical rows of numerals thereon arranged in overlapping relation forming a plurality of radiatingcolumns of numerals, successive groups of 'columnsforming month calendars, asecond indicia'bearing member having characters representingthe months of a year; slotted mask means'for designating particular monthcharacters and month calendars, said members being relatively shiftable whereby the various possible month calendars for a givenmonth register with said means, and means, including year date indicia for setting said members whereby the monthcharacters and month calendars are disposed in the correeach of the various possible month calendar arrangements, said composite year calendar also including supplementary month calendar units and month representing characters relating to the months varied in arrangement by reason of leap year.

7. In a perpetual calendar, a chart having year dates arranged in groups in which all the normal years having identical arrangements of month calendars for corresponding months are arranged in a single group, means for designating each of said groups, a composite year calendar including relatively shiftable month indicia and month calendars adapted to be set to represent each of the various possible monthcalendar arrangements, and an instrumentality for designating a particular month and corresponding month calendar of said composite year calendar, said composite year calendar also including supplementary month calendar units and month representing characters relating to the months varied in arrangement by reason of leap year.

8. A perpetual calendar comprising, a first member, characters thereon representing the several months of a year, a second member, a series of overlapping groups of indicia thereon, each group representing a possible month calendar, one of said members bearing a plurality of year dates arranged in groups all the years of similar classification as to arrangements of month calendars for corresponding months thereof being placed in a single group, means associated with the other member for designating any one of the several groups of year dates whereby the month characters and month calendar groups are in predetermined corresponding relation, and an instrumentality for designating a particular calendar.

ORPHA A. CHIDESTER. 20 

